High-pressure steam boiler



June 28, 1927.

E. A. HARDISON HIGH PRESSURE STEAM BOILER Filed April 18. 1921 2Sheets-Sheet l June 28 1927. 1,633,663

E. A. HARDISON HIGH PRESSURE STEAM BOILER Filed April 18, L921 2Sheets-Sheqt 2 Invenz'or' Edwm A Hzrcl6022 Patented June 28, 1927.

UNITED STATES 1,633,663 PATENT OFFICE,

EDwI'N A. H'ARnIsoIv, or LOS ANGELES, CALIFORNIA, ASSIG-NOE T FIR-STNATION L p BA1\TK & raus'r 00., or SANTA PAULA, CALIFORNIA.

IIIGILraEssIiRE STEAM 'BoILER.

Application filed April 18, 1921. Serial No. 462,100.

This invention is applicable to steam boilers, steam condensers,refrigerators and the like in which heat is. to be translated ortransferred from one medium to another.

This invention relates to a steam boiler of that type in which there'isprovided withina water and steam container or shell, a nest of openended water tubes arranged cries-cross relative to each other; said nestcomprising aflue across which the water tubes extend to open at bothends into the water and. steam space inside the shell and outside theflue.

An object of this invention is to provide a water tube boiler of cheapand simple construction which is easily constructed and can be easilytaken apart for cleaning and repairing, or for. replacingtubes, and canbe easily put together without disturbing the fittings or connections ofthe boiler.

An object is to provide a water tube boiler of the type just referred towhich is cheap and simple in: construction and is adapted to supplysteam. atextremely high pressure oped.

An. object of the invention is to so construct the boiler that it willsustain excessive pressures, and to make provision whereby goodcirculation within the boiler issecured; alsoto provide for an effectivesteam dome in any position in which the boi-ler'is placedratus.

Fig. 2 is a top view or the embodiment.

shown in Fig. 1. V c f i Fig- 3 is an axial section on line w ,'Fig. 2.5o Fig. 4 is a side elevation showing an em- ,bodiment like that of thepreceding views arranged aslant to an exaggerated degree on a brick workfire :box-or furnaee'Portions are broken away and. partly sectionedonhead removed.

' and with great economy of heat, and with which a maximum heatingsurface is devel- Other objects, advantages and features of inventionmay appear from the accompanyheater, a condenser, or arefr geratingappaline 9 Fig. 2, toexpose exterior and also interior constructlon'ofthe flue.

v Fig. 5 is a fragmental' view in section on, line a Fig. 2, showingunlon'of shell and 'head. 9

Fig. 6 is an outside plan of either head removed. v Fig. 7 is aperspective view of the water tube nest or flue shown in precedingviews.

Fig. 8 is a view of the inside faceof either Fig. 9 is a fragmental viewillustrating a joint between a head and the stay bolts that hold theparts together.

I Fig-10 is a view analogous to Fig. 9 showing another form in which a.steeple nut is used. Y

11 is a perspective view illustrating a steam. boiler in placeconstructed in accordance with thisinvention and having a fine trolley.i

Fig; 12 is a iragmental view of the boiler shown in Fig. 11; the headbeing removed to allow the flue to be withdrawn. I

The shell 1 is of any suitable form and is shown as a cylindricalwall-connected to the heads 2, 3. 'Each of these heads is provided withan outer grooved flange 4 in which the shell 1 is seated on a copper.wire washer 5. Said heads are also provided with an inner grooved flange6'in. which is seated the parallel walled flue 7 which is formed withfour fiat sides.

ers as at 5. The shell and flue forces the copper washers 5 against theouter wall a of theouter grooved flange for the shell and the inner Wall5 of the inner grooved flange for the flue, th'ereby making the jointssteam tight when the heads are secured in place;

The heads are provided respectivelywith a flue opening 8, and the innergrooved flange formed by the annular walls 9, 10

' forming the flue seat. The flue openings 8, are preferably square andare surrounded.

by the annular Walls 9, 10 to receivethe ends of'the'flue 7 which fitsin saidinner grooved flange or seat 6. r

Said flue is provided with series 11, 12 of water tubes. The axesof thetubes of each series are arranged in planes at right angles .to the axisof'theflue;'thetubes'11 of one series being transversely arranged to thetubes 12 of another series. The tubes of The "shell 1 and flue 7 arefitted at each end to bear upon copper washshell and the flue in theseats a and 6 in the bottom and top heads,'the partsare secured togetherby the stay bolts 13, 13, each having nuts 14 and 15 at the oppositeends and ductile washers 16 preferably of copper,held

in annular seats 17 therefor.

In the case of a boiler, water is fed thereto by the low level pipe 18and steam is drawn out through the high level pipe 19.

The unit constructed of the flue and tubes is complete within itself andcan be detached from and applied to the service desired; and wheneverrepairs are required, the whole unit may be taken out and a new unitsubstituted therefor in a'very short time.

It is also apparent that by removing the top head 3 the flue? can beremoved and a new one inserted; thereby further reducing the expense ofrepairing, when only the flue is damaged.

In the horizontal boiler shown in Figs. 11 and 12, the flue is carriedby a carriage as the antifriction trolley at 20, adapted to travel on atrack formed by flanges of a flanged beam 21 secured to the crown of theshell. By this construction and arrangement it is made convenient to runthe flue with its tubes out of the shell on the antifriction meanssupported by the track 21 and any extension thereof, which may betemporarily provided outside the boiler in an obvious manner; so thatthe labor and expense of repairing the boiler and of re- .moving andreplacing tubes is reduced to a minimum as compared with the labor andcost of such repairs of eflicient boilers heretofore known.

In practical use the boiler may be placed in any position but ispreferably arranged as suggested by Figs. 4 and 11 with one corner ofthe flue at a relatively low level so that the tubes are all aslant thusto insure circulation.

and the shell is set so asto cause all the est facility for circulationfrom lower shell surface up through the flue.

If the shell or the flue or the tubes should need repair, they are veryreadily reached by removing one head and withdrawing the flue and itsnest of tubes bodily from the In the forms shown in Figs 11 and 12, theflue is practically horizontal shell, thus giving unobstructed access tothe flue and to the shell for inspection and repairs and in case oflarge boilers such as indicated in Fig. 11, the interior of the. shellwill be accessible to the workman who can go inside and repair bywelding or riveting.

The replacing of tubes can be performed outside of the boiler. It isapparent from Fig. 11 that the fire space for the boiler may extend onthe outside of the shell and tubes and on the inside of the flue thusgiving a maximum heating surface.

The stay bolts 13 are inserted through holes that exactly fit theunthreaded portion of said bolts; and channels 22 in the units or headsmay beprovided to receive the washers 16 of copper or other suitablematerial; or the nuts alone may be provided with channels to receivethewasher. The steeple nuts 15 may be used on the ends of the staybolts. With this form of nut and the copper washer shown, leakage ispractically impossible. I l

The stay bolts are so disposed relative to each other the shell and theflue as to equalize the pressure on the gaskets, the shell, the flue andthe heads; and to this end are shown arranged in two groups, the groupof stay bolts 13 being arranged close to the outer shell 1 and the groupof stay bolts 13' being arranged near the wall of the flue 7 so thatwhen the nuts ltand 15 are tightened, the necessary pressure isequalized as to the heads and as applied to the copper gaskets, and itis possible to so apply such pressure as to withstand very highgenerated pressure in the boiler.

I have constructed boilers of this type which have been tested to coldpressure of 1150 pounds before any leakage was ap parent, and as thepressure was reduced to 1100 pounds the leakage ceased, and upon againincreasing the pressure to 1150 pounds the leakage was apparent, Eitherof the heads 8 or 9 can be quickly removed by loosening the nuts 14 or15. The stay bolts are so distributed as to equalize the pressure on allof the bolts. r I

I claim:

1. A steam boiler of the character set forth comprising a shell and twoheads therefor to form a container, said heads provided with orificesand inner and outer grooved flanges; a flue open to said orifices andbeing formed with four flat sides havingends seated in said innergrooved flanges, said flue forming with said shell a chambertherebetween; criss-cross tubes for said flue communicating at theirends with said chamber; a flanged beam securedto the crown of said shelland forming a track; and a carriage secured to said flue and having ananti-friction trolley adapted to travel on said track to facilitateremoval of the flue container when one of the heads is detached.

2. steam boiler of the character set forth comprising a shell and twoend heads to form a container, said heads provided with orifices andinner and outer grooved 5 flanges; a flue open to said orifices andhaving ends seated in said inner grooved flanges, saidflue forming withsaid shell a chamber therebetween cries-cross tubes for said fluecommunicating at their ends with 10 said chamber; a flanged beam securedto the crown of said shell and forming a track; and a carriage securedto said flue and having an anti-friction trolley adapted to travel onsaid track for normally supporting said shell and to facilitate removalof the'same in its entirety. I 1 i In testimony whereof, I have hereuntoset my hand at Los Angeles, California, this 30th day of March, 1921.

E. A. HARDISON,

